Diesel Particulate Filter Pressure Sensor A Circuit
Common Symptoms
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor fuel economy
- Excessive black smoke from exhaust
- Regeneration cycle may not complete properly
Most Likely Root Causes
- Faulty DPF differential pressure sensor
- Damaged or corroded wiring to pressure sensor
- Clogged or kinked pressure sensor hoses
- Loose or corroded electrical connector at sensor
- Failed Engine Control Module (rare)
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Component Location
DPF differential pressure sensor is typically mounted on the engine block or firewall with hoses connected to the DPF inlet and outlet.
Manufacturer Notes
Many diesel manufacturers require specific scan tool commands to verify DPF pressure sensor calibration and zero-point offset.
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